128243384 has 8 divisors (see below), whose sum is σ = 240456360. Its totient is φ = 64121688.

The previous prime is 128243363. The next prime is 128243389. The reversal of 128243384 is 483342821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128243389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8015204 + ... + 8015219.

It is an arithmetic number, because the mean of its divisors is an integer number (30057045).

Almost surely, 2^128243384 is an apocalyptic number.

It is an amenable number.

128243384 is a deficient number, since it is larger than the sum of its proper divisors (112212976).

128243384 is a wasteful number, since it uses less digits than its factorization.

128243384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16030429 (or 16030425 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 128243384 is about 11324.4595456030. The cubic root of 128243384 is about 504.2876392024.

The spelling of 128243384 in words is "one hundred twenty-eight million, two hundred forty-three thousand, three hundred eighty-four".